System for preparing high-dispersity acetylene carbon black
Through the mixing and conduction treatment of H2O2 solution and acetylene carbon black, the problem of low dispersion and purity of acetylene carbon black was solved, and a highly dispersible acetylene carbon black was prepared, which had excellent dispersion, stability and conductivity, and no impurities were introduced.
Patent Information
- Application Number
- CN202422307695.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the prior art, acetylene carbon black has low dispersion and purity in polar solvent systems, and impurities will be introduced by the use of traditional dispersants.
The H2O2 solution is mixed with the raw material acetylene carbon black and then the conductive treatment is carried out in the conductive treatment device. The carbon black modified cylinder is subjected to electric field treatment to prepare highly dispersible acetylene carbon black and avoid the use of dispersants.
The prepared highly dispersible acetylene carbon black has excellent dispersion and stability in polar solvents, high purity, low resistivity, no precipitation and agglomeration, and uniform performance.
Smart Images
Figure CN223170888U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of carbon black production, and particularly relates to a system for preparing highly dispersible acetylene black. Background Art
[0002] Acetylene black (also known as acetylene black, Acetylene black) is carbon black obtained by pyrolyzing acetylene with a purity of more than 99% obtained by decomposing and refining the by-product gas during the calcium carbide method or the pyrolysis of naphtha (crude gasoline). After continuous pyrolysis, it has a more developed crystal and secondary structure compared with furnace black, so it has better conductivity and liquid absorption. Since there are few impurities such as heavy metals, the loss caused by self-discharge is small. It is mainly used for the negative electrode of nickel-metal hydride batteries and can also be used for supercapacitors as a conductor.
[0003] When preparing acetylene black by traditional processes, acetylene and air need to be sent into a carbon black furnace for heating operation, and the temperature of the furnace is controlled between 800 °C and 1200 °C. During this process, acetylene and air will undergo a chemical reaction to generate acetylene black.
[0004] When the above acetylene black is applied in a polar solvent system, its dispersibility is insufficient. At present, in order to improve the dispersibility and stability of carbon black in a polar solvent system, dispersants are mainly used for auxiliary dispersion. However, since a dispersion aid is added to acetylene black, impurities will be indirectly introduced, reducing the purity of acetylene black, resulting in low purity. Therefore, a preparation system for highly dispersible acetylene black is needed to prepare acetylene black with high purity and high dispersibility. Summary of the Invention
[0005] In view of this, the utility model provides a system for preparing highly dispersible acetylene black to solve the technical problems of low dispersibility and low purity of the acetylene black prepared in the prior art.
[0006] To achieve the above object, the present application adopts the following solutions:
[0007] A system for preparing highly dispersible acetylene black is connected to the outlet of a raw material acetylene black production system, and includes a batching device and a conductive treatment device; the batching device includes: an H2O2 solution storage tank and a mixer, the outlet of the H2O2 solution storage tank and the outlet of the raw material acetylene black production system are both connected to the inlet of the mixer; the conductive treatment device includes: a power supply and at least one carbon black modification cylinder, both ends of the carbon black modification cylinder are provided with covers, and conductive columns are provided on the covers, and the conductive columns are all connected to the power supply, and the mixer is correspondingly arranged with the carbon black modification cylinder.
[0008] Preferably, the cover is an insulating cover, and the cover is provided with a through hole, one end of the conductive column passes through the through hole and is in interference fit with the through hole.
[0009] Preferably, the cover body is a conductive cover body, and the conductive column is arranged on the cover body and located at the geometric center of the surface of the cover body.
[0010] Preferably, the H2O2 solution storage tank is provided with a heating device and a heat preservation jacket.
[0011] Preferably, the batching device further includes a water storage tank and a high-concentration H2O2 storage tank, and the inlets of the H2O2 solution storage tank are respectively connected to the outlets of the water storage tank and the high-concentration H2O2 storage tank.
[0012] Preferably, a concentration detector is arranged on the H2O2 solution storage tank, control valves are respectively arranged on the water storage tank and the high-concentration H2O2 storage tank, and the control valves are electrically connected to the concentration detector.
[0013] Preferably, a first drying device is further included, the carbon black modification cylinder is correspondingly arranged with the first drying device, and the liquid outlet of the first drying device is connected to the inlet of the water storage tank.
[0014] Preferably, a wetting device is further included, the solid outlet of the first drying device and the outlet of the water storage tank are both connected to the inlet of the wetting device, and the wetting liquid outlet of the wetting device is connected to the inlet of the water storage tank.
[0015] Preferably, a granulating device is further included, and the solid outlet of the wetting device is connected to the inlet of the granulating device.
[0016] Preferably, a second drying device is further included, the outlet of the granulating device is connected to the inlet of the second drying device, the liquid outlet of the second drying device is connected to the inlet of the water storage tank, and the solid outlet of the second drying device is the outlet of high-dispersibility acetylene carbon black particles.
[0017] The technical solution adopted in this application can achieve the following beneficial effects:
[0018] 1. The system for preparing highly dispersed acetylene black provided by this application, through the batching device and the conductive treatment device, prepares a mixture of H2O2 solution and raw material acetylene black in a mixer, and introduces the mixture into the carbon black modification cylinder for conductive treatment. After the conductive treatment is completed, highly dispersed acetylene black is obtained. The dispersion value of the prepared highly dispersed acetylene black is 18.8, and the hydroxyl value is 0.33mgKOH / g. Compared with the dispersion value of 8.21 of the raw material acetylene black, the highly dispersed acetylene black prepared by the system for preparing highly dispersed acetylene black provided by this application has a higher dispersion. Moreover, when preparing highly dispersed acetylene black by mixing raw material acetylene black with H2O2 solution for conductive treatment, no dispersant or auxiliary agent is introduced. Therefore, the prepared highly dispersed acetylene black has no impurities and a high purity;
[0019] 2. The resistivity of the highly dispersed acetylene black prepared by the system for preparing highly dispersed acetylene black provided by this application is 1.25Ω·m. Compared with the resistivity of 3Ω·m of high-quality acetylene black on the market, it has high dispersion and high conductivity at the same time;
[0020] 3. When the prepared highly dispersed acetylene black is left standing in normal temperature water for 15 days, there is no precipitation, no stratification, and no agglomeration. While when the raw material acetylene black is left standing in normal temperature water for more than 5 days, there is precipitation, stratification, and agglomeration. It can be seen that the highly dispersed acetylene black prepared by the system for preparing highly dispersed acetylene black provided by this application also has good stability. Description of the Drawings
[0021] Figure 1 It is a schematic diagram of the system for preparing highly dispersed acetylene black in this application;
[0022] Figure 2 It is a cross-sectional view of the conductive treatment device in an embodiment of this application;
[0023] Figure 3 It is a cross-sectional view of the conductive treatment device in another embodiment of this application.
[0024] In the figure, H2O2 solution storage tank 110, concentration detector 111, mixer 120, water storage tank 130, high-concentration H2O2 storage tank 140, carbon black modification cylinder 210, cover 211, conductive column 212, raw material acetylene black production system 300, first drying device 400, infiltration device 500, granulation device 600, second drying device 700. Detailed Embodiments
[0025] To facilitate the understanding of the present application, the present application will be described more comprehensively below in conjunction with the accompanying drawings. And the preferred embodiments of the present application are given. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.
[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0027] In this embodiment, please refer to Figures 1 to 3 , a system for preparing highly dispersed acetylene black, which is connected to the outlet of the raw material acetylene black production system 300, and includes a batching device and a conductive treatment device:
[0028] Among them, the batching device includes: an H2O2 solution storage tank 110 and a mixer 120. The outlet of the H2O2 solution storage tank 110 and the outlet of the raw material acetylene black production system 300 are both connected to the inlet of the mixer 120; the conductive treatment device includes: at least one carbon black modification cylinder 210. Covers 211 are provided at both ends of the carbon black modification cylinder 210, and conductive columns 212 are provided on the covers 211. The conductive columns 212 are all connected to a power source, and the mixer 120 is correspondingly arranged with the carbon black modification cylinder 210.
[0029] Manufacture the ingredient device and the conductive treatment device and connect them in sequence to form the system for preparing highly dispersed acetylene black. The H2O2 solution storage tank 110 is used to store the H2O2 solution, and the concentration of the H2O2 solution can be prepared according to actual needs. In this embodiment, the mass concentration of the H2O2 solution is 1% to 5%; the mixer 120 is used to mix the H2O2 solution and the raw material acetylene black to obtain a mixture, and the mass ratio of the H2O2 solution to the raw material acetylene black can be selected according to actual needs. In this embodiment, the mass ratio of the H2O2 solution to the raw material acetylene black is 1 to 3:10; the conductive treatment device provided in this application includes at least one carbon black modification cylinder 210. The carbon black modification cylinder 210 can be a cylindrical cylinder or a square cylinder, and the size of the carbon black modification cylinder 210 can be set according to actual needs. Preferably, two carbon black modification cylinders 210 are provided and can be used alternately to save time and improve efficiency; covers 211 are provided at both ends of the carbon black modification cylinder 210, and conductive columns 212 are provided on the covers 211. The conductive columns 212 are connected to a power supply. The mixer 120 is correspondingly arranged with the carbon black modification cylinder 210, that is to say, the carbon black modification cylinder 210 is arranged near the physical position of the mixer 120 for convenient material guiding. That is, after the mixture in the mixer 120 is mixed, it can be conveniently transferred into the carbon black modification cylinder 210. For example: the carbon black modification cylinder 210 can be arranged on the left and right sides of the mixer 120, or can be arranged below the mixer 120. Preferably, the carbon black modification cylinder 210 is located below the outlet of the mixer 120 for directly receiving the mixture in the mixer 120.
[0030] During use, first prepare a certain mass concentration of the H2O2 solution and store the prepared H2O2 solution in the H2O2 solution storage tank 110 for standby; then, introduce the raw material acetylene black produced by the raw material acetylene black production system 300 into the mixer 120. At the same time, open the H2O2 solution control valve to prepare a mixture in the mixer 120; next, open the cover 211 (upper cover 211) of the carbon black modification cylinder 210 and introduce the mixture in the mixer 120 into the carbon black modification cylinder 210. When the carbon black modification cylinder 210 is filled with the mixture, cover the cover 211, turn on the power switch, and the conductive column 212 remains in an energized state to conduct electricity on the mixture. The energization voltage is 220V to 380V, preferably 220V. When the current in the detection circuit basically no longer fluctuates, that is, when the current in the circuit is constant, turn off the power switch, and the conductive treatment ends to obtain highly dispersed acetylene black. In some specific embodiments, the power supply is a constant voltage power supply, and the voltage of the constant voltage power supply is preferably 220V.
[0031] The system for preparing highly dispersed acetylene black provided by this application, through the batching device and the conductive treatment device, prepares a mixture of H2O2 solution and raw acetylene black in the mixer 120, and introduces the mixture into the carbon black modification cylinder 210 for conductive treatment. After the conductive treatment is completed, highly dispersed acetylene black is obtained. The dispersion value of the prepared highly dispersed acetylene black is 18.8, and the hydroxyl value is 0.33mgKOH / g. Compared with the dispersion value of 8.21 of the raw acetylene black, the highly dispersed acetylene black prepared by the system for preparing highly dispersed acetylene black provided by this application has a higher dispersion. Moreover, when preparing highly dispersed acetylene black by mixing the raw acetylene black with the H2O2 solution for conductive treatment, no dispersant or auxiliary agent is introduced. Therefore, the prepared highly dispersed acetylene black has no impurities and a high purity. The resistivity of the highly dispersed acetylene black prepared by the system for preparing highly dispersed acetylene black provided by this application is 1.25Ω·m. Compared with the resistivity of 3Ω·m of high-quality acetylene black on the market, it has high dispersion and high conductivity at the same time. When the prepared highly dispersed acetylene black is left standing in normal-temperature water for 15 days, there is no precipitation, no stratification, and no agglomeration. While the raw acetylene black has precipitation, stratification, and agglomeration when left standing in normal-temperature water for more than 5 days. It can be seen that the stability of the highly dispersed acetylene black prepared by the system for preparing highly dispersed acetylene black provided by this application is also good.
[0032] In some specific embodiments, the cover body 211 is an insulating cover body, and the cover body 211 is provided with a through hole. One end of the conductive column 212 passes through the through hole and is in interference fit with the through hole. During use, when the carbon black modification cylinder 210 is filled with the mixture, the cover body 211 is covered. When the conductive column 212 is connected to a power source, the current generated by the conductive column 212 is distributed to the carbon black modification cylinder 210 to conductively treat the mixture to obtain highly dispersed acetylene black.
[0033] In the above embodiment, since the cover body 211 is an insulating cover body and one end of the conductive column 212 passes through the through hole on the cover body 211, during the conductive treatment, the end of the conductive column 212 discharges severely, resulting in an uneven electric field distribution in the carbon black modification cylinder 210 (generally, the electric field is strong in the center and weaker near the cylinder wall of the carbon black modification cylinder 210), leading to an uneven distribution of the electric field (which can also be considered as current) in the carbon black modification cylinder 210, resulting in a low uniformity of the final product. Moreover, due to the severe discharge at the end of the conductive column 212, the current density on the conductive column 212 is large, and the conductive column 212 generates a lot of heat and is easily burned out. In some preferred embodiments, the cover body 211 is a conductive cover body, and the conductive column 212 is arranged on the cover body 211 and is located at the geometric center of the surface of the cover body 211.
[0034] During use, when the carbon black modification cylinder 210 is filled with the mixture, the cover 211 is covered. When the conductive column 212 is connected to a power source, the current generated by the conductive column 212 is first distributed to the cover 211. The current distributed on the cover 211 is conducted to the mixture in the carbon black modification cylinder 210, and the mixture is conductively treated to obtain highly dispersed acetylene black. The conductive column 212 does not pass through the cover 211, which can effectively prevent tip discharge of the conductive column 212. At the same time, the entire cover 211 conducts electricity to the mixture, with a uniform electric field distribution. The upper and lower covers 211 conduct electricity similar to a parallel plate capacitor, with a uniform electric field intensity distribution, avoiding the problem of uneven electric field distribution on the wall of the carbon black modification cylinder 210, and effectively preventing the problem that the conductive column 212 is prone to serious overheating and burnout, saving the financial, material and human resources brought by maintenance and replacement.
[0035] To make the conductive treatment of the mixture more sufficient, in some preferred embodiments, the H2O2 solution storage tank 110 is provided with a heating device and a heat preservation jacket. The heating device can heat the H2O2 solution. The temperature of the H2O2 solution can be 40°C to 60°C. The heated H2O2 solution can be fully mixed with the mixture. The raw material acetylene black is in powder form, and the heated H2O2 solution can be fully mixed with the powdered raw material acetylene black, so that there is H2O2 solution around each small particle of the powdered raw material acetylene black. In this way, during the conductive treatment, each small particle of the powdered raw material acetylene black can be effectively conductively treated, so that the conductive treatment of the mixture is more sufficient, and the performance of the highly dispersed acetylene black obtained after the conductive treatment is more uniform and better.
[0036] To prepare the H2O2 solution with the required mass concentration, in some specific embodiments, the batching device further includes a water storage tank 130 and a high-concentration H2O2 storage tank 140. The inlet of the H2O2 solution storage tank 110 is respectively connected to the outlets of the water storage tank 130 and the high-concentration H2O2 storage tank 140. The water storage tank 130 is used to hold water, preferably deionized water in this embodiment, and the high-concentration H2O2 storage tank 140 is used to hold high-concentration H2O2.
[0037] During use, the control valves on the water storage tank 130 and the high-concentration H2O2 storage tank 140 are respectively opened, so that the water in the water storage tank 130 and the high-concentration H2O2 in the high-concentration H2O2 storage tank 140 are introduced into the H2O2 solution storage tank 110 to prepare a H2O2 solution with a certain mass concentration for standby.
[0038] To accurately detect the mass concentration of the H2O2 solution in the H2O2 solution storage tank 110, preferably, a concentration detector 111 is provided on the H2O2 solution storage tank 110. Control valves are respectively provided on the water storage tank 130 and the high-concentration H2O2 storage tank 140. The control valves are electrically connected to the concentration detector 111. The concentration detector 111 can detect the mass concentration of the H2O2 solution in the H2O2 solution storage. When it is detected that the mass concentration of the H2O2 solution in the H2O2 solution storage tank 110 does not meet the standard, the control valves on the water storage tank 130 and the high-concentration H2O2 storage tank 140 are controlled to supplement water or high-concentration H2O2. In this embodiment, the mass concentration of the H2O2 solution is 1% to 5%.
[0039] Considering that the mixture contains moisture, after the conductive treatment, the obtained highly dispersed acetylene black also contains moisture. In some preferred embodiments, a first drying device 400 is further included. The lower end of the carbon black modification cylinder 210 is connected to the inlet of the first drying device 400, and the liquid outlet of the first drying device 400 is connected to the inlet of the water storage tank 130.
[0040] During use, after the conductive treatment of the mixture is completed, the cover 211 at the lower end of the carbon black modification cylinder 210 is opened, and the highly dispersed acetylene black in the carbon black modification cylinder 210 is introduced into the first drying device 400 for drying to a certain extent. The specific degree of drying can be determined according to the actual needs of those skilled in the art. After drying, the dried highly dispersed acetylene black is exported through the solid outlet of the first drying device 400, and the liquid in the first drying device 400 is discharged into the water storage tank 130 through the liquid outlet of the first drying device 400 for reuse.
[0041] To facilitate transportation and improve the comprehensive performance of the prepared highly dispersed acetylene black so that the highly dispersed acetylene black can be widely used in fields such as new lead-acid batteries, primary and secondary lithium batteries, and extra-high voltage cables, it is necessary to granulate the highly dispersed acetylene black. The wet granulation process is the main technology for acetylene black granulation at present. In this application, a wetting device 500 is further included. The solid outlet of the first drying device 400 and the outlet of the water storage tank 130 are both connected to the inlet of the wetting device 500. The wetting device 500 has a solid outlet and a wetting liquid outlet, and the wetting liquid outlet is connected to the inlet of the water storage tank 130.
[0042] In use, first, the dried highly-dispersed acetylene black is introduced into the wetting device 500 through the solid outlet of the first drying device 400. At the same time, water in the water storage tank 130 is introduced into the wetting device 500. The ratio of the highly-dispersed acetylene black to the water can be in accordance with the ratio of acetylene black to water during wetting in the prior art. The highly-dispersed acetylene black is wetted by water to enhance its hydrophilic property. Further, the temperature of the water during wetting is 60°C to 80°C.
[0043] It further includes a granulating device 600, and the solid outlet of the wetting device 500 is connected to the inlet of the granulating device 600.
[0044] It should be noted that the highly-dispersed acetylene black after wetting treatment is granulated through the traditional granulation process and device in the prior art, which will not be elaborated here. Through the granulating device 600, highly-dispersed acetylene black particles are obtained. The dispersibility value of the highly-dispersed acetylene black particles is 18.8, and the hydroxyl value is 0.33 mgKOH / g. The highly-dispersed acetylene black particles provided in this application have a relatively high dispersibility, and during the preparation process, no dispersant or auxiliary agent is introduced. Therefore, the prepared highly-dispersed acetylene black particles do not contain impurities and have a high purity; the resistivity of the highly-dispersed acetylene black particles provided in this application is 1.25
[0045] Ω·m, having high dispersibility and high conductivity at the same time.
[0046] The highly-dispersed acetylene black particles obtained by granulation through the granulating device 600 contain moisture. In some preferred embodiments, it further includes a second drying device 700. The outlet of the granulating device 600 is connected to the inlet of the second drying device 700. The second drying device 700 has a solid outlet and a liquid outlet. The liquid outlet of the second drying device 700 is connected to the inlet of the water storage tank 130, and the solid outlet of the second drying device 700 is the outlet of the highly-dispersed acetylene black particles.
[0047] In use, the highly dispersed acetylene black particles are introduced into the second drying device 700 from the outlet of the granulating device 600 and dried to a certain extent. The specific degree of drying can be determined according to the actual needs of those skilled in the art. After drying, the dried highly dispersed acetylene black particles are exported through the solid outlet of the second drying device 700, and the liquid in the second drying device 700 is discharged into the water storage tank 130 through the liquid outlet of the second drying device 700 for reuse. In some preferred embodiments, a vibration motor is provided on the carbon black modification cylinder 210. When the mixture is introduced into the carbon black modification cylinder 210, the vibration motor is turned on, which can compact the mixture and make the mixture evenly filled in the carbon black modification cylinder 210. After being filled, the cover body 211 is covered, and the power switch is turned on for conducting treatment.
[0048] The above is only the specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should be covered within the protection scope of the present invention.
Claims
1. A system for preparing highly dispersed acetylene black, which is connected to the outlet of the raw material acetylene black production system, is characterized in that, It includes a batching device and a conductive treatment device; The batching device includes: an H2O2 solution storage tank and a mixer. The outlet of the H2O2 solution storage tank and the outlet of the raw material acetylene black production system are both connected to the inlet of the mixer; The conductive treatment device includes: a power supply and at least one carbon black modification cylinder. Covers are provided at both ends of the carbon black modification cylinder, and conductive columns are provided on the covers. The conductive columns are all connected to the power supply, and the mixer is correspondingly arranged with the carbon black modification cylinder.
2. The system for preparing highly dispersed acetylene black according to claim 1, wherein The cover is an insulating cover, and the cover is provided with a through hole. One end of the conductive column passes through the through hole and is in interference fit with the through hole.
3. The system for preparing highly dispersed acetylene black according to claim 1, wherein The cover is a conductive cover. The conductive column is arranged on the cover and is located at the geometric center of the cover surface.
4. The system for preparing highly dispersed acetylene black according to claim 1, wherein The H2O2 solution storage tank is provided with a heating device and a heat preservation jacket.
5. The system for preparing highly dispersed acetylene black according to claim 1, wherein The batching device further includes a water storage tank and a high-concentration H2O2 storage tank. The inlet of the H2O2 solution storage tank is respectively connected to the outlets of the water storage tank and the high-concentration H2O2 storage tank.
6. The system for preparing highly dispersed acetylene black according to claim 5, characterized in that, A concentration detector is provided on the H2O2 solution storage tank, and control valves are respectively provided on the water storage tank and the high-concentration H2O2 storage tank. The control valves are both electrically connected to the concentration detector.
7. The system for preparing highly dispersed acetylene black according to claim 5, characterized in that, It further includes a first drying device. The carbon black modification cylinder is correspondingly arranged with the first drying device. The liquid outlet of the first drying device is connected to the inlet of the water storage tank.
8. The system for preparing highly dispersed acetylene black according to claim 7, characterized in that, It further includes a wetting device. The solid outlet of the first drying device and the outlet of the water storage tank are both connected to the inlet of the wetting device. The wetting liquid outlet of the wetting device is connected to the inlet of the water storage tank.
9. The system for preparing highly dispersed acetylene black according to claim 8, wherein It further includes a granulating device. The solid outlet of the wetting device is connected to the inlet of the granulating device.
10. The system for preparing highly dispersed acetylene black according to claim 9, wherein It further includes a second drying device. The outlet of the granulating device is connected to the inlet of the second drying device. The liquid outlet of the second drying device is connected to the inlet of the water storage tank. The solid outlet of the second drying device is the outlet of high-dispersibility acetylene black particles.